陶瓷球为磨矿介质的长石磨矿动力学研究

Study on the Grinding Kinetics of Feldspar with Ceramic Ball as Grinding Medium

以0.3~0.6 mm的钾长石作为研究对象,探究以陶瓷球为磨矿介质的磨矿动力学。在磨矿介质为陶瓷球和钢球的球磨机内进行磨矿动力学试验,得到不同粒级的筛上累计产率并计算得到对应的ln(R_(0)/R),在Origin中拟合得到两者磨矿动力学方程。结果表明,两种磨矿介质均符合一阶磨矿动力学模型,且粒径d和磨矿动力学参数k呈幂函数相关。以陶瓷球作为磨矿介质,在介质充填率为40%的情况下,磨矿动力学方程为R=R_(0)exp[-(0.00506+0.62238d^(1.49467))t]。当介质充填率或磨矿介质质量相同时,陶瓷球较钢球磨矿速度更慢,且在较粗粒级时尤为明显。因此,在实验室阶段陶瓷球作为磨矿介质对钾长石的破碎能力具有一定的局限性。

Taking 0.3-0.6 mm potassium feldspar as the research object,the grinding kinetics of ceramic ball as grinding media was investigated.The grinding kinetics experiment was carried out in the ball mill with ceramic ball and steel ball as grinding media,and the cumulative distribution on the screen of different grain sizes was obtained and the corresponding ln(R_(0)/R)was calculated.The grinding kinetics equation of the two was obtained by fitting in Origin.The results showed that the two kinds of grinding media were in accordance with the first-order grinding dynamics model,and the particle size d and the grinding dynamics parameter k had power function correlation.Finally,the grinding kinetics equation was R=R_(0)exp[-(0.00506+0.62238d^(1.49467))t]when the ceramic ball was used as grinding media and the filling ratio was 40%.When the filling ratio of media was the same,the grinding speed was slower than that of steel ball,especially in coarser grain size.The same result was obtained when the total weight of grinding media was the same.Therefore,in the laboratory stage,the crushing ability of ceramic ball as grinding medium to potassium feldspar had certain limitations.